Flow-X─ Function Reference
4-51
Flow-X General functions - fx3CellSelection
fx3CellSelection
Description
The function selects between 3 input cells (typically differential pressure cells) based on the actual
measured value and the failure status of each cell.
The function can handle the following type of cell range configurations:
Lo – Mid – Hi
Lo – Hi – Hi
Hi – Hi – Hi
Where ‘Lo’ means low range, ‘Mid’ mid range and ‘Hi’ high range.
Function
Function inputs
Remark
EU
SW tag
Range
Default
Name
Cell A value
Input value as percentage of span
of cell A
Cell A status
Input status of cell A
0: Normal
<> 0 : Failure
Cell B value
Input value as percentage of span
of cell B
Cell B status
Input status of cell B
0: Normal
<> 0 : Failure
Cell C value
Input value as percentage of span
of cell C
Cell C status
Input status of cell C
0: Normal
<> 0 : Failure
Range type
For a description of the
functionality refer to adjacent
section ‘Logic’
1: Lo Mid Hi
Cell A at low range
Cell B at mid range
Cell C at high range
2: Lo Hi Hi
Cell A at low range
Cell B and C at high range
3: Hi Hi Hi
Cell A, B and C at same range
RNGTYP
Auto
switchback
For a description of the
functionality refer to adjacent
section ‘Logic’
0: Disabled
1: Enabled
Switch-up
percentage
Switch-up value expressed as
percentage of span of the lower
range
Does not apply for selection type
‘Hi Hi Hi’
-
SWUPPERC
0..100
95
Switch-down
percentage
Switch-down value expressed as
percentage of span of the lower
range
Does not apply for selection type
‘Hi Hi Hi’
-
SWDNPERC
0..100
90
Summary of Contents for flow-x
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